Question 2d layer transparency "remove matte (PSD)" having unusal side-effects

so i recently opted to go and change all my pdf filed in my scenes to PSD as to easily edit them in real time in my scenes i have a lot of blur added to backround layers in photoshop. when importing i noticed the white glow effect and looked up how to fix it and found the "remove matte PSD" button. well its having unusual side effects. the blured areas are actualy darker than the actual layer itself its hard to tell from a screenshot but its very noticable when i run the game. is there a reason this is caused and is there a way to fix it?
(ps first time using this specific thread idk if this is the right place to go for PSD issues)

also i've already tried using an alpha layer in photoshop and that just makes it worse